function getUrlParam(key) {
	var url = decodeURI(window.location.toString());
	var arr = url.split("?")
	if (arr.length > 1) {
		var params = arr[1].split("&");
		for (var i = 0; i < params.length; i++) {
			var param = params[i]
			if (param.split("=")[0] == key) {
				return param.split("=")[1]
			}
		}
	}
	return null
}